Preparation

Whisk first 3 ingredients in small bowl to blend; transfer to 13x9x2-inch glass baking dish. Place salmon, skin side up, in orange juice mixture; cover with plastic and chill at least 2 hours and up to 4 hours. Bring to room temperature 30 minutes before cooking.

Using small sharp knife, cut peel and white pith from oranges. Working over bowl, cut between membranes to release segments into bowl.

Preheat oven to 450°F. Line rimmed baking sheet with foil; generously brush with vegetable oil. Place fish, skin side down, on prepared baking sheet. Sprinkle with salt and pepper. Bake until fish is just opaque in center, about 20 minutes. Using large spatula, gently loosen salmon from foil. Using foil as aid, carefully lift salmon from sheet and allow salmon to slide from foil onto platter. Mound orange relish down center of fish, sprinkle with sesame seeds, and serve.